Pyrazolopyrimidine compound, application of pyrazolopyrimidine compound and luminous device
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A pyrazolopyrimidine and compound technology, applied in the field of organic electroluminescent materials, can solve problems such as charge imbalance in the light-emitting layer, lower device efficiency, and difficult flow of electrons, and achieve high luminous purity, good thermal stability, and high luminescence efficiency effect
Inactive Publication Date: 2018-09-04
SHANGHIA TAOE CHEM TECH CO LTD
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Problems solved by technology
However, due to the characteristics of CBP that holes are easy to transport and electrons are difficult to flow, the charge in the light-emitting layer is unbalanced, which reduces the efficiency of the device.
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Embodiment 1
[0046] Synthetic route of compound 7
[0047]
[0048] The synthetic method of compound 7
[0049] In a flask, add 3-iodo-6-bromopyrazolo[1,5-a]pyrimidine (1g, 3.1mmol), 4-dianilinophenylboronic acid (1.8g, 6.2mmol), potassium carbonate (0.86g , 6.2mmol), tetrakistriphenylphosphine palladium (50mg), tetrahydrofuran (20mL) and water (10mL), under the protection of nitrogen, heated to reflux for 12 hours, cooled, extracted with dichloromethane, dried, concentrated, the crude product was Purified by column chromatography to obtain 1.59 g of the product with a yield of 85%.
Embodiment 2
[0051] Synthetic route of compound 10
[0052]
[0053] The synthetic method of intermediate 10-1
[0054] The synthesis method is the same as that of compound 7, the raw materials used are 3-iodo-6-bromopyrazolo[1,5-a]pyrimidine and 2-triphenylene boronic acid, and the yield is 67%.
[0055] The synthetic method of compound 10
[0056] Its synthesis method is the same as that of compound 7, the raw materials used are intermediate 10-1 and 4-carbazolylphenylboronic acid, and the yield is 78%.
Embodiment 3
[0058] Synthetic route of compound 11
[0059]
[0060] Its synthesis method is the same as that of compound 7, the raw materials used are 3-iodo-6-bromopyrazolo[1,5-a]pyrimidine and 4-carbazolylphenylboronic acid, and the yield is 82%.
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Abstract
The invention provides a pyrazolopyrimidine compound which has the following structural formula as shown in the specification. The pyrazolopyrimidine compound has higher thermostability and high luminous efficiency and luminous purity, and can be applied to the field of organic electroluminescent devices, solar batteries, organic thin film transistors and organic photoreceptors. The invention further provides an organic electroluminescent device which comprises an anode, a cathode and an organic layer, wherein the organic layer comprises at least one of a luminous layer, a hole injection layer, a hole transmission layer, a hole barrier layer, an electron injection layer and an electron transmission layer; at least one layer of the organic layer comprises the pyrazolopyrimidine compound shown as structural formula I; and the organic electroluminescent device manufactured by the pyrazolopyrimidine compound has high efficiency and light purity.
Description
technical field [0001] The invention relates to the field of organic electroluminescent materials, in particular to a pyrazolopyrimidine compound and its application, and also to a light-emitting device. Background technique [0002] Organic electroluminescent devices (OLEDs) are devices prepared by depositing a layer of organic materials between two metal electrodes by spin coating or vacuum evaporation. A classic three-layer organic electroluminescent device includes a hole transport layer, emissive layer and electron transport layer. The holes generated by the anode are combined with the electrons generated by the cathode through the hole transport layer to form excitons in the light emitting layer through the hole transport layer, and then emit light. Organic electroluminescent devices can be adjusted to emit various required lights by changing the material of the light-emitting layer as required. [0003] As a new type of display technology, organic electroluminescent...
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